| 424961 | Jun 16, 1994 | Jun 16, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Kenedy | KMF #1 | 6,800 | 26131151 |
| 424620 | Jun 7, 1994 | Jun 7, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Luker, B.J. #1 | 16,000 | 17532785 |
| 423199 | Apr 22, 1994 | Apr 22, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #1 | 12,800 | 42732675 |
| 422967Amendment | Apr 18, 1994 | Apr 18, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Starr | Garcia - Gonzales Gas Unit #1 | 7,000 | 42732674 |
| 422518 | Mar 29, 1994 | Mar 29, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Karnes | Labus #1 | 16,000 | 25531337 |
| 421600 | Feb 28, 1994 | Feb 28, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #1 | 12,987 | 42732537 |
| 421332 | Feb 22, 1994 | Feb 22, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Starr | Orive, A. #7 | 7,100 | 42732660 |
| 421332Amendment | Feb 22, 1994 | Feb 22, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Starr | Orive, A. #7 | 7,100 | 42732660 |
| 420700 | Feb 1, 1994 | Feb 1, 1994 | Sanchez-O'Brien Oil & Gas Corp. | De Witt | Remmers (Deep) Gas Unit #5 | 14,500 | 12331745 |
| 420700Amendment | Feb 1, 1994 | Feb 1, 1994 | Sanchez-O'Brien Oil & Gas Corp. | De Witt | Remmers (Deep) Gas Unit #5 | 14,500 | 12331745 |
| 419892 | Jan 4, 1994 | Jan 4, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Karnes | Bauhof Gas Unit #1 | 15,000 | 25531333 |
| 419892Amendment | Jan 4, 1994 | Jan 4, 1994 | Sanchez-O'Brien Oil & Gas Corp. | Karnes | Bauhof Gas Unit #1 | 15,000 | 25531333 |
| 419783 | Dec 30, 1993 | Dec 30, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #1 | 9,850 | 42732520 |
| 419633 | Dec 23, 1993 | Dec 23, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #4 | 14,000 | 42732556 |
| 418587 | Nov 23, 1993 | Nov 23, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Ramirez #1 | 12,750 | 50533123 |
| 417607 | Oct 29, 1993 | Oct 29, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Wendt #2 | 13,000 | 13137783 |
| 417607Amendment | Oct 29, 1993 | Oct 29, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Wendt #2 | 13,000 | 13137783 |
| 417065 | Oct 14, 1993 | Oct 14, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Bednorz-Parkhill Unit #1 | 15,500 | 17532739 |
| 417065Amendment | Oct 14, 1993 | Oct 14, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Bednorz-Parkhill Unit #1 | 16,500 | 17532739 |
| 417065Amendment | Oct 14, 1993 | Oct 14, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Parkhill-Bednorz Gas Unit #1 | 16,500 | 17532739 |
| 415328 | Aug 24, 1993 | Aug 24, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Wendt #1 | 13,000 | 13137756 |
| 415328Amendment | Aug 24, 1993 | Aug 24, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Wendt #1 | 13,000 | 13137756 |
| 415327 | Aug 24, 1993 | Aug 24, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Hilbrich-Sellers #1R | 15,500 | 17532723 |
| 415327Amendment | Aug 24, 1993 | Aug 24, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Hilbrich-Sellers #1R | 15,500 | 17532723 |
| 413977 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #5 | 13,600 | 42732598 |
| 413977Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #6 | 13,600 | 42732598 |
| 413977Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #6 | 14,600 | 42732598 |
| 413976 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #6 | 13,900 | 42732597 |
| 413975 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #7 | 15,200 | 42732596 |
| 413975Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #7 | 14,300 | 42732596 |
| 413975Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #7 | 14,300 | 42732596 |
| 413974 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #8 | 13,200 | 42732595 |
| 413974Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #5 | 13,200 | 42732595 |
| 413974Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #5 | 13,400 | 42732595 |
| 413974Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #5 | 13,400 | 42732595 |
| 413974Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #5 | 13,400 | 42732595 |
| 413973 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #9 | 15,600 | 42732594 |
| 413973Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #9 | 15,600 | 42732594 |
| 413972 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #12 | 13,800 | 42732599 |
| 413972Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #12 | 13,800 | 42732599 |
| 413972Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #12 | 13,800 | 42732599 |
| 413971 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #11 | 12,800 | 42732592 |
| 413970 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #10 | 14,200 | 42732593 |
| 413970Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #7 | 14,200 | 42732593 |
| 413970Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #7 | 14,200 | 42732593 |
| 413970Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #7 | 14,200 | 42732593 |
| 413969 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #9 | 12,400 | 42732600 |
| 413969Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #4 | 14,000 | 42732600 |
| 413968 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #8 | 13,400 | 42732601 |
| 413968Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #3 | 12,766 | 42732601 |
| 413968Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #3 | 12,770 | 42732601 |
| 413968Amendment | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 3 #3 | 14,000 | 42732601 |
| 413967 | Jul 16, 1993 | Jul 16, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #7 | 12,400 | 42732602 |
| 412574 | Jun 8, 1993 | Jun 8, 1993 | Sanchez-O'Brien Oil & Gas Corp. | De Witt | Fuhrken, Lola #1 | 14,950 | 12331733 |
| 412574Amendment | Jun 8, 1993 | Jun 8, 1993 | Sanchez-O'Brien Oil & Gas Corp. | De Witt | Lola Fuhrken Gas Unit #1 | 14,950 | 12331733 |
| 412574Amendment | Jun 8, 1993 | Jun 8, 1993 | Sanchez-O'Brien Oil & Gas Corp. | De Witt | Lola Fuhrken Gas Unit #1 | 14,950 | 12331733 |
| 412211 | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA #103 | 16,000 | 42732577 |
| 412211Amendment | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #3 | 16,000 | 42732577 |
| 412211Amendment | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #3 | 15,069 | 42732577 |
| 412210 | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA #104 | 15,700 | 42732576 |
| 412210Amendment | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #4 | 15,700 | 42732576 |
| 412210Amendment | May 27, 1993 | May 27, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #4 | 15,700 | 42732576 |
| 412013 | May 21, 1993 | May 21, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA #205 | 11,300 | 42732575 |
| 412013Amendment | May 21, 1993 | May 21, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #5 | 11,300 | 42732575 |
| 412013Amendment | May 21, 1993 | May 21, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #5 | 12,100 | 42732575 |
| 411074 | Apr 26, 1993 | Apr 26, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Goliad | Hilbrich-Sellers #1 | 15,500 | 25531328 |
| 411074Amendment | Apr 26, 1993 | Apr 26, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Karnes | Hilbrich-Sellers #1 | 15,500 | 25531328 |
| 410428 | Apr 1, 1993 | Apr 1, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA #401 | 12,200 | 42732566 |
| 410107 | Mar 23, 1993 | Mar 23, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Bunk, J.F. #1 | 9,300 | 32131535 |
| 409113 | Feb 18, 1993 | Feb 18, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #4 | 14,000 | 42732556 |
| 409113Amendment | Feb 18, 1993 | Feb 18, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #4 | 14,000 | 42732556 |
| 409112 | Feb 18, 1993 | Feb 18, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #2 | 16,200 | 42732557 |
| 409112Amendment | Feb 18, 1993 | Feb 18, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA #102 | 16,200 | 42732557 |
| 409112Amendment | Feb 18, 1993 | Feb 18, 1993 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #2 | 13,900 | 42732557 |
| 406258 | Nov 18, 1992 | Nov 18, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Exxon Fee #1 | 13,000 | 13137635 |
| 406257 | Nov 18, 1992 | Nov 18, 1992 | Sanchez-O'Brien Oil & Gas Corp. | San Patricio | White Point Oil & Gas #2 | 7,500 | 40932414 |
| 403748 | Sep 22, 1992 | Sep 22, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #3 | 11,350 | 42732542 |
| 403748Amendment | Sep 22, 1992 | Sep 22, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #3 | 11,350 | 42732542 |
| 403075 | Sep 2, 1992 | Sep 2, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #1 | 15,500 | 42732537 |
| 403075Amendment | Sep 2, 1992 | Sep 2, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 1 #1 | 12,987 | 42732537 |
| 402618 | Aug 24, 1992 | Aug 24, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #2 | 14,650 | 42732534 |
| 402618Amendment | Aug 24, 1992 | Aug 24, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #2 | 14,650 | 42732534 |
| 402618Amendment | Aug 24, 1992 | Aug 24, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #2 | 14,650 | 42732534 |
| 400997 | Jul 8, 1992 | Jul 8, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L.M. #40 | 9,000 | 47935022 |
| 400514 | Jun 24, 1992 | Jun 24, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #6 | 5,590 | 47931009 |
| 400514Amendment | Jun 24, 1992 | Jun 24, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #6 | 5,590 | 47931009 |
| 400116 | Jun 11, 1992 | Jun 11, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Hidalgo | Coates #2 | 12,000 | 21532075 |
| 399950 | Jun 4, 1992 | Jun 4, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | White, J. H. #5 | 6,700 | 50532433 |
| 399950Amendment | Jun 4, 1992 | Jun 4, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | White, J. H. #5 | 6,700 | 50532433 |
| 399717 | May 27, 1992 | May 27, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #1 | 12,000 | 42732520 |
| 399717Amendment | May 27, 1992 | May 27, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #1 | 13,500 | 42732520 |
| 399717Amendment | May 27, 1992 | May 27, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Starr | USA 2 #1 | 13,500 | 42732520 |
| 397693 | Mar 23, 1992 | Mar 23, 1992 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Martin, S. J. #1A | 9,600 | 47932414 |
| 395533 | Dec 31, 1991 | Dec 31, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | White, J.H. #1A | 11,100 | 50532852 |
| 395533Amendment | Dec 31, 1991 | Dec 31, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | White, J.H. #1A | 10,500 | 50532852 |
| 395473 | Dec 30, 1991 | Dec 30, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Leyendecker #4 | 9,200 | 47935017 |
| 393937 | Nov 13, 1991 | Nov 13, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Hahl #1 | 13,000 | 13137523 |
| 393937Amendment | Nov 13, 1991 | Nov 13, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Hahl #2 | 13,000 | 13137523 |
| 393937Amendment | Nov 13, 1991 | Nov 13, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Hahl #2 | 13,000 | 13137523 |
| 393937Amendment | Nov 13, 1991 | Nov 13, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Hahl #2 | 13,000 | 13137523 |